"It was only a matter of time that we would average 400 parts per million globally," said Pieter Tans, lead scientist of NOAA's Global Greenhouse Gas Reference Network. "We first reported 400 ppm when all of our Arctic sites reached that value in the spring of 2012. In 2013 the record at NOAA's Mauna Loa Observatory first crossed the 400 ppm threshold. Reaching 400 parts per million as a global average is a significant milestone.
"This marks the fact that humans burning fossil fuels have caused global carbon dioxide concentrations to rise more than 120 parts per million since pre-industrial times," added Tans. "Half of that rise has occurred since 1980." (...)
Tuesday's record high temperature follows another high reading of 63.3°F set just the day before. Until this week's heat wave, the highest-known recorded temperature on the continent was 62.6°F back in 1976.
The Antarctic Peninsula where the readings were made "is one of the fastest warming spots on Earth," reports The Weather Undergound. The website cites studies from 2012 that show the world is warming at a quickening pace.
Five nations and territories have tied or hit all-time high temperature records so far this year.
Credit Nature Climate Change
A fresh analysis of thousands of temperature measurements from deep-diving Argo ocean probes shows (yet again) that Earth is experiencing “unabated planetary warming” when you factor in the vast amount of greenhouse-trapped heat that ends up in the sea. This is not even close to a new finding, but the new study shows more precisely where most of the heat has been going since 2006 (in the Southern Ocean outside the tropics; see the red splotches in the map below).